<!DOCTYPE html>
<html>
  <head><meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
    <link href="css/siwiui.css" rel="stylesheet">
    <style>
      .odd {
        height:50px;
        background-color:red;
        margin-top: 10px;
        color: white;
      }
      .even {
        margin-top: 10px;
        height:50px;
        background-color:purple;
        color: white;
      }
    </style>
  </head>
</html>
<body></body>
<div class="container">
  <div class="row">
    <div class="col-xs-12 col-sm-6 col-md-4 col-lg-2 col-1 odd"></div>
  </div>
  <div class="row">
    <div class="col-xs-8 offset-xs-4 even col-2 offset-2"></div>
  </div>
</div>